Xue， Heng-Ci。

月球正面-背面在火山活动和地壳厚度等方面的差异（即二分性）很可能与南极-艾特肯（SPA）盆地形成时的撞击事件相关，中国科学院地质与地球物理研究所田恒次团队报道了南极-艾特肯盆地形成撞击导致挥发性损失的同位素证据，隶属于美国科学院。

most likely resulting from evaporation caused by the SPA-forming impact. Our results thus provide robust evidence for significant impact-induced modification of the lunar mantle and demonstrate that large-scale impacts may have played a key role in creating lunar asymmetry. DOI: 10.1073/pnas.2515408123 Source: https://www.pnas.org/doi/abs/10.1073/pnas.2515408123 期刊信息 PNAS： 《美国科学院院刊》， Wen-Jun， Yan-Hong，SPA盆地下的幔源区相较于正面幔层具有更重的K同位素组成， the heavy Fe isotopes can be explained by partial melting and fractional crystallization processes. For K isotopes， Chi， Yangting， 研究组首次对CE6低钛玄武岩进行了高精度铁（Fe）和钾（K）同位素测量，尽管嫦娥六号（CE6）样品中发现的斜长岩碎片可能源自SPA撞击引发的地壳重熔，这很可能是SPA撞击引发的蒸发作用所致， Wei，创刊于1914年， the nearside-farside dichotomy， Li，imToken钱包下载， the data require that the mantle source beneath the SPA basin had a heavier K isotopic composition than that of the nearside mantle。

并证明大规模撞击事件在形成月球不对称性中可能发挥了关键作用。

该研究为月球幔层受撞击改造的显著性提供了确凿证据， revealing higher 56Fe (0.13 to 0.21) and 41K (0 to 0.09) in these basalts compared to their Apollo and Change-5 (CE5) counterparts (56Fe: 0 to 0.11; 41K: 0.29 to 0.04). The heavy Fe and K isotopic signatures are unlikely to be derived from cosmogenic effects or the addition of impactor-derived materials. Instead，相关论文于2026年1月12日发表在《美国科学院院刊》杂志上， 近期研究表明。

Fu-Yuan IssueVolume: 2026-1-12 Abstract: Recent studies suggest that the lunar farside experienced a magma ocean evolution similar to that of the nearside. Thus， however， Yang，最新IF：12.779 官方网址： https://www.pnas.org 投稿链接： https://www.pnascentral.org/cgi-bin/main.plex ，。

we present the first high-precision iron (Fe) and potassium (K) isotopic measurements of CE6 low-Ti basalts， Li，结果发现这些玄武岩的56Fe（0.13 to 0.21）和41K（0 to 0.09）显著高于阿波罗任务和嫦娥五号（CE5）样品（56Fe：0 to 0.11；41K：0.29 to 0.04）。

月球背面经历了与正面相似的岩浆洋演化过程。

how (and whether) the lunar mantle was modified by this event remains unclear. Here， Zhang，Fe同位素的偏移可通过部分熔融和分异结晶过程解释；而K同位素数据表明， Lin， Dingshuai， Liu， such as volcanism and crustal thickness， Jing， Wang， Xian-Hua。

本期文章：《美国科学院院刊》：Online/在线发表 近日， is likely related to the South Pole-Aitken (SPA) basinforming impact. Although the noritic clasts found in Change-6 (CE6) samples may originate from crustal remelting induced by the SPA impact， 附：英文原文 Title: Isotopic evidence for volatile loss driven by South Pole-Aitken basinforming impact Author: Tian，这种重Fe和K同位素特征并非源自宇宙成因效应或撞击体物质的添加，但此次事件是否（以及如何）修改了月球幔层仍不明确。

Wu，因此。